Six amorphous alloys (Alloy 1: Fe<sub>56</sub>Co<sub>24</sub>Nb<sub>4</sub>B<sub>13</sub>Si<sub>2</sub>Cu<sub>1</sub>, Alloy 2: Fe<sub>68.5...Six amorphous alloys (Alloy 1: Fe<sub>56</sub>Co<sub>24</sub>Nb<sub>4</sub>B<sub>13</sub>Si<sub>2</sub>Cu<sub>1</sub>, Alloy 2: Fe<sub>68.5</sub>Co<sub>5</sub>Nb<sub>3</sub>Cu<sub>1</sub>Si<sub>15.5</sub>B<sub>7</sub>, Alloy 3: Fe<sub>75.3</sub>Ni<sub>0.8</sub>Cr<sub>0.9</sub>Si<sub>8.7</sub>B<sub>14.3</sub>, Alloy 4: Fe<sub>56</sub>Co<sub>24</sub>Cr<sub>10</sub>Nb<sub>4</sub>B<sub>3</sub>Si<sub>1</sub>Cu<sub>2</sub>, Alloy 5: Fe<sub>72.9</sub>Nb<sub>3</sub>Cu<sub>1</sub>Si<sub>16.2</sub>B<sub>6.9</sub>, Alloy 6: Fe<sub>83.3</sub>Si<sub>8.6</sub>Nb<sub>5.5</sub>B<sub>1.4</sub>Cu<sub>1.2</sub>) were selected in terms of their composition and magnetostriction constants and uniformly irradiated in a high radiation environment in Hall A of the Thomas Jefferson National Accelerator Facility. The 2 GeV electron beam irradiation-induced effects were characterized by Mӧssbauer spectroscopy. The microstructural changes were related to the evolution of the hyperfine magnetic field distributions and isomer shifts. In particular, the occurrence of stress centers in the amorphous materials was evidenced.展开更多
文摘Six amorphous alloys (Alloy 1: Fe<sub>56</sub>Co<sub>24</sub>Nb<sub>4</sub>B<sub>13</sub>Si<sub>2</sub>Cu<sub>1</sub>, Alloy 2: Fe<sub>68.5</sub>Co<sub>5</sub>Nb<sub>3</sub>Cu<sub>1</sub>Si<sub>15.5</sub>B<sub>7</sub>, Alloy 3: Fe<sub>75.3</sub>Ni<sub>0.8</sub>Cr<sub>0.9</sub>Si<sub>8.7</sub>B<sub>14.3</sub>, Alloy 4: Fe<sub>56</sub>Co<sub>24</sub>Cr<sub>10</sub>Nb<sub>4</sub>B<sub>3</sub>Si<sub>1</sub>Cu<sub>2</sub>, Alloy 5: Fe<sub>72.9</sub>Nb<sub>3</sub>Cu<sub>1</sub>Si<sub>16.2</sub>B<sub>6.9</sub>, Alloy 6: Fe<sub>83.3</sub>Si<sub>8.6</sub>Nb<sub>5.5</sub>B<sub>1.4</sub>Cu<sub>1.2</sub>) were selected in terms of their composition and magnetostriction constants and uniformly irradiated in a high radiation environment in Hall A of the Thomas Jefferson National Accelerator Facility. The 2 GeV electron beam irradiation-induced effects were characterized by Mӧssbauer spectroscopy. The microstructural changes were related to the evolution of the hyperfine magnetic field distributions and isomer shifts. In particular, the occurrence of stress centers in the amorphous materials was evidenced.
